<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>响应式布局基础</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/layout5.css">
</head>
<body>
<div class="wrapper"></div>
<div class="header">
    <h1>响应式设计</h1>
</div>
<div class="main">
    <div class="sidebar">
        <p>侧边栏</p>
    </div>
    <div class="content">
        <p>内容</p>
    </div>
</div>
<div class="footer">
    <address>页脚：地址信息</address>
</div>
</body>
</html>